Hoisting device



H. L. BERKEY HOISTING DEVICE A June 12, 1934.

4 Sheets-Sheet 1 Filed April 27, 1933 Z? inventor h. L. flew/r7 flllorney June 12, 1934.

H. L. BERKEY HOISTING DEVICE Filed April 27, 1933 4 Sheets-Sheet 2 Inventor M912, 1934. H L BERKE 1,962,130

HOISTING DEVICE Filed April 27, 1955 4 Sheets-Sheet 3 Inventor J4 Home y June 12,1934. H. L. BIERKEY 1,962,130

HOI STING DEVICE Filed April 27, 1933 4 Sheets-Sheet 4 Inventor /7.Z. agar/r7 I flzwao/izm f1 llome y Patented June 12, 1934 1 UNITED STATES OFFICE 1,962,130 HOISTING ,iDEVI CE Harry L. Berkey, Marion Center, Pa.

Application April27, 1933, Serial No. 668,265

3 Claims. (01. 254-75) The presentinvention appertains to new and by a suitable securing element'14 and has its useful improvements in means for lifting heavy intermediate portions spaced from the clevis. loads, wherein the step by step principle of ful- This plate 13 has an inverted Y-shaped slot 15 crum and lever is employed. therein. A pair of link members 16-16 each has The principal object of the present invention an opening at one of its ends to receive a pin 17 60 is to provide a novel hand tool which can be emwhich rides in the Y-shaped slot 15, while their ployed efficiently for handling heavy loads, the remaining ends are pivotally secured, as at 18, device affording a powerful leverage and having a to the lower ends of the aforementioned bell cranks much more universal use than devices of this 7. The remaining upper ends of these bell cranks character now in general use. have coiled extensible springs 19 interposed be- ".65

Another important object of the invention is to tween the same and the studs 20 on the head porprovide a hand tool of the hoist line type, wherein tions 10 of the claws 9.

the parts are of strong, positive acting construc- Numeral 21 repreesnts a clevis to which the tion and not susceptible to the development of plate 13 is secured, this clevis being swingably '15 ready defects. connected to the yoke 6, as at 22. The clevis 21 Other important objects and advantages of the suspends an eyelet 23 which is connected to the invention will become apparent to the reader of lifting hook 24 by a ring 25. Obviously, when the following specification. the handle 5 is moved downwardly from the posi- In the drawings: tion shown in Figure l, the clevis 21 is being 20 Figure 1 represents a side elevational view of lifted, and the latter in turn lifting its load, and the tool in a position ready to start a cycle of this lift continues until the hand lever 5 reaches operation. the position shown in Figure 3, whereupon the Figure 2 represents a side elevational view of reverse motion of the lever 5 is started and althe tool after the lever has been moved downmost instantly the pin 17 rides out of the up- 25 wardly a short distance. permost part of the Y-shaped slot 15 and rides Figure 3 represents a side elevational view of into the diverged slot toward the left, which, due the tool after the lever has been moved downto the spring connection 26 between the two wardly its full extent. pivot points 18-18, causes a snapping action of Figure 4 represents a side elevational view of the corresponding bell crank 7 so that the claw "30 the tool with the lever moved upwardly towards on the left is thrown toward the chain 12 and completing the other half cycle. engages the same in the manner substantially Figure 5 represents a side elevational view of shown in Figure 4. The lever is now continued the tool just after the claw on the right has disupwardly and in so doing, the claw on the left in en a d and wit the lever v d pw d y o t the drawings carries the chain toward the left "35 full extent. and this results in the shifting of the pin 17 from Figure 6 represents a slde elevational vlew of one of the slot extensions to the other slot extenthe about ready to start the second Cycle Of sion thus causing a tripping action of the law p io and with the left claw engaged Wlth on the left, so that this last mentioned claw is 1711B c1191mthrown away from the chain and by moving the 40 Figure 7 represents a top plan view of the tool lever downwardly again to a position correspond- Flgure 3 represents a perspectwe Vlew of one ing to the position shown in Figure 1, the claws of th C aw headsare in a osition to start another 0 cle of o Referring to the drawings wherein like numertion p y Dem als designate like parts, it can be seen in Figure 1 While the fore gom s ecification sets forth that? the tool Includes an elongated hand leYer 5 the invention in speciii c t rms, it is to be underhavmg yoke 6 at one end thereof A palr of stood that numerous changes in the sape, size elements 7-'? of substantially bell crank construction each has its intermediate portion secured to and matenals may be tesorted to Wlthout departa shaft end, there being two shafts 8-8 which mg from the spirit and scope of the invgntmn extend through the yoke 6, each being provided as claimed hereinafterwith an outstanding claw 9. Each of these claws Having described the inVentiOn, W at is 1 is provided with a slotted claw head 10 and a pair claimed as new is:-- of closely spaced guide flanges l1 inwardly of the 1. A hoisting tool of the character described head whereby the links of the chain 12 are guided. comprising a hand lever having a yoke, a pair of -55 A plate 13 is secured to one side of the clevis 21 swingable claws on the yoke, bell cranks carried by the yoke, said bell cranks being swingable on the yoke, a spring interposed between one end of each of the bell cranks and a corresponding claw, a spring connection between the remaining ends of the bell cranks, a clevis suspended from the yoke and center changing means interposed between the said clevis and the said bell cranks.

2. A hoisting tool of the character described comprising a hand lever having a yoke, a pair of swingable claws on the yoke, bell cranks carried by the yoke, said bell cranks being swingable on the yoke, a spring interposed between one end of each of the bell cranks and a corresponding claw, a spring connection between the remaining ends of the bell cranks, a clevis suspended from the yoke and center changing means interposed between the said clevis and the said bell cranks, said means comprising a pair of diverging slots on the clevis link members extending toward the clevis from the spring connected ends of the bell cranks and a pin for pivotally connecting the inner ends of the links together, said pin being operative in the said slots.

3. A hoisting tool of the character described comprising a hand lever having a yoke, a pair of swingable claws on the yoke, bell cranks carried by the yoke, said bell cranks being swingable on the yoke, a spring interposed between one end of each of the bell cranks and a corresponding claw, a spring connection between the remaining ends of the bell cranks, a clevis suspended from the yoke, center changing means interposed between the said clevis and the said bell cranks, said means comprising a pair of diverging slots on the clevis, link members extending toward the clevis from the spring connected ends of the bell cranks and a pin for pivotally connecting the inner ends of the links together, said pin being operative in the said slots, said clevis being provided with a notch at the merging point of the said slots for centering the claws when the pin engages therein.

HARRY L. BERKEY. I 

